AD7398BR-REEL7 Analog Devices, AD7398BR-REEL7 Datasheet

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AD7398BR-REEL7

Manufacturer Part Number
AD7398BR-REEL7
Description
Quad/ Serial-Input 12-Bit/10-Bit DACs
Manufacturer
Analog Devices
Datasheet
a
GENERAL DESCRIPTION
The AD7398/AD7399 family of quad, 12-bit/10-bit, voltage-
output digital-to-analog converters is designed to operate from a
single 3 V to 5 V or a dual ±5 V supply. Built with Analog’s robust
CBCMOS process, this monolithic DAC offers the user low
cost, and ease-of-use in single or dual-supply systems.
The applied external reference V
output voltage. Valid V
result in a wide selection of full-scale outputs. For multiplying
applications ac inputs can be as large as ± 5 V
A doubled-buffered serial-data interface offers high-speed,
3-wire, SPI and microcontroller-compatible inputs using serial-
data-in (SDI), clock (CLK), and a chip-select (CS). A common
level-sensitive load-DAC strobe (LDAC) input allows simulta-
neous update of all DAC outputs from previously loaded Input
Registers. Additionally, an internal power ON reset forces the
output voltage to zero at system turn ON. An external asynchro-
nous reset (RS) also forces all registers to the zero code state. A
programmable power-shutdown feature reduces power dissipa-
tion on unused DACs.
Both parts are offered in the same pinout to enable users to
select the appropriate resolution for their application without
redesigning the layout. For 8-bit resolution applications see the
pin compatible AD7304 product.
The AD7398/AD7399 is specified over the extended industrial
(–40°C to +125°C) temperature range. Parts are available in
wide body SOIC-16 and ultracompact thin 1.1 mm TSSOP-
16 packages.
REF
values include V
REF
determines the full-scale
SS
P
< V
.
REF
< V
DD
that
CLK
SDI
CS
–0.40
–0.50
V
–0.10
–0.20
–0.30
REGISTER
ON RESET
0.50
0.40
0.30
0.20
0.10
SS
SERIAL
POWER
0
V
0
DD
12/10
FUNCTIONAL BLOCK DIAGRAM
512
RS
REG D
REG A
REG B
REG C
INPUT
INPUT
INPUT
INPUT
1024
12-Bit/10-Bit DACs
1536
Quad, Serial-Input
AD7398/AD7399
CODE – Decimal
REGISTER
REGISTER
REGISTER
REGISTER
DAC A
DAC B
DAC C
DAC D
LDAC
2048
V
V
REF
REF
2560
B
C V
DAC A
DAC B
DAC C
DAC D
V
3072
REF
REF
D
V
V
V
T
A
A
DD
SS
REF
= 25 C
3584
= –5V
= +5V
= +2.5V
GND
°
4096
V
V
V
V
OUT
OUT
OUT
OUT
A
B
C
D

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AD7398BR-REEL7 Summary of contents

Page 1

GENERAL DESCRIPTION The AD7398/AD7399 family of quad, 12-bit/10-bit, voltage- output digital-to-analog converters is designed to operate from a single dual ±5 V supply. Built with Analog’s robust CBCMOS process, this monolithic DAC ...

Page 2

AD7398/AD7399–SPECIFICATIONS AD7398 12-BIT VOLTAGE OUTPUT DAC P arameter Symbol STATIC PERFORMANCE 1 Resolution N 2 Relative Accuracy INL 2 Differential Nonlinearity DNL Zero-Scale Error V ZSE Full-Scale Voltage Error V FSE 3 Full-Scale Tempco TCV REFERENCE INPUT ...

Page 3

AD7399 10-BIT VOLTAGE OUTPUT DAC P arameter Symbol STATIC PERFORMANCE 1 Resolution N 2 Relative Accuracy INL 2 Differential Nonlinearity DNL Zero-Scale Error V ZSE Full-Scale Voltage Error V FSE 3 Full-Scale Tempco TCV REFERENCE INPUT Range ...

Page 4

... SOIC Package (R-16 158°C/W 16-Lead Thin Shrink Surface Mount (RU-16 180°C/W Maximum Junction Temperature (T Max 150°C J Package Power Dissipation . . . . . . . . . . . . . (T Resolution Model (Bits) AD7398BR 12 AD7398BR-REEL7 12 AD7398BRU-REEL7 12 AD7399BR 10 AD7399BR-REEL7 10 AD7399BRU-REEL7 10 The AD7398 contains 3254 transistors. The die size measures 108 mil × 144 millimeters. ...

Page 5

Pin No. Mnemonic Function DAC B Voltage Output. OUT DAC A Voltage Output. OUT 3 V Negative Power Supply Input. Specified range of operation –5 DAC ...

Page 6

AD7398/AD7399 CS LDAC CLK Serial Shift Register Function Effect Effect ↑ Shift-Register-Data Advanced One Bit Effect ↑ Effect ...

Page 7

TERMINOLOGY Relative Accuracy, INL For the DAC, relative accuracy or integral nonlinearity (INL measure of the maximum deviation, in LSBs, from a straight line passing through the endpoints of the DAC transfer function. A typical INL versus code ...

Page 8

AD7398/AD7399 –Typical Performance Characteristics 1.50 1.25 1.00 0.75 0.50 0.25 0 –0.25 –0.50 –0.75 –1.00 2560 512 1024 1536 2048 0 CODE – Decimal 0.50 0. +5V DD –0. –5V ...

Page 9

DNL 0.50 0.25 INL 0 FSE –0.25 –0.50 –0.75 –1.00 –5 –4 –3 –2 – REFERENCE VOLTAGE – Volts 100.00 AD7398 90. +5V DD 80. –5V ...

Page 10

AD7398/AD7399 100 TIME – 100ns/DIV –5V REF 100 TIME – 5 s/DIV –5V REF ...

Page 11

AD7398/AD7399 V = +5V 2 –5V SS 2.0 1.5 1.0 0.5 0 – 100 TEMPERATURE – AD7398/AD7399 – –60 –40 ...

Page 12

AD7398/AD7399 AD7398/AD7399 CS CLK SDI SERIAL REGISTER POWER ON RESET CIRCUIT OPERATION The AD7398 and AD7399 contain four, 12-bit and 10-bit, voltage-output, digital-to-analog converters respectively. Each DAC has its own independent multiplying reference input. Both AD7398/AD7399 use 3-wire SPI-compatible serial ...

Page 13

One should at least budget the V offset voltage as the closest the output voltage ZSE can get to either supply voltage ...

Page 14

AD7398/AD7399 ADSP-2101/ADSP-2103 to AD7398/AD7399 Interface Figure 8 shows a serial interface between the AD7398/AD7399 and the ADSP-2101/ADSP-2103. The ADSP-2101/ADSP-2103 is set to operate in the SPORT (Serial Port) transmit alternate framing mode. The ADSP-2101/ADSP-2103 is programmed through the SPORT control ...

Page 15

APPLICATIONS STAIRCASE WINDOWS COMPARATOR Many applications need to determine whether voltage levels are within predetermined limits. Some requirements are for non- overlapping windows and others for overlapping windows. Both circuit configurations are shown in Figures 12 and 13 respectively. V ...

Page 16

AD7398/AD7399 16-Lead Wide SOIC (R-16) 0.4133 (10.50) 0.3977 (10.00 0.2992 (7.60) 0.2914 (7.40) 0.4193 (10.65 0.3937 (10.00) PIN 1 0.1043 (2.65) 0.050 (1.27) BSC 0.0926 (2.35) 0.0118 (0.30) 0.0192 (0.49) SEATING 0.0125 (0.32) PLANE 0.0138 (0.35) ...

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